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package mx.its.dsw2.biblioteca.dao;

import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import mx.its.dsw2.biblioteca.enumeracion.EstadoDetallePrestamo;
import mx.its.dsw2.biblioteca.modelo.DetallePrestamo;
import mx.its.dsw2.biblioteca.modelo.Libro;
import mx.its.dsw2.biblioteca.modelo.Prestamo;

/**
 *
 * @author Maq-8
 */
@Stateless
public class DetallePrestamoDao extends AbstractDao<DetallePrestamo> implements DetallePrestamoDaoLocal {
    @PersistenceContext(unitName = "Biblioteca8E-ejbPU")
    private EntityManager em;

    @Override
    protected EntityManager getEntityManager() {
        return em;
    }

    public DetallePrestamoDao() {
        super(DetallePrestamo.class);
    }
    //DetallePrestamo.findLends

    @Override
    public List<DetallePrestamo> findLends(Prestamo lends) {
    Query q=em.createNamedQuery("DetallePrestamo.findLend");
    q.setParameter("estado", EstadoDetallePrestamo.PRESTADO.ordinal());
    q.setParameter("idPrestamo", lends.getId());
        return q.getResultList();
    }

    @Override
    public DetallePrestamo findBooks(Libro book) {
        Query q=em.createNamedQuery("DetallePrestamo.findBooks");
        q.setParameter("estado", EstadoDetallePrestamo.PRESTADO.ordinal());
        q.setParameter("idLibro", book.getId());
        if(q.getResultList().isEmpty()){
        return null;
        }else{
        return (DetallePrestamo)q.getResultList().get(0);
    }
    }
}
